Ultrasonic liquid level sensor and switch



FIG. 1 is a front bottom isometric view of an ultrasonic liquid level sensor and switch, showing our design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a top view thereof.

The broken line showing in the drawings shows portions of the ultrasonic liquid level sensor and switch and forms no part of the claimed design. 

CLAIM The ornamental design for an ultrasonic liquid level sensor and switch, as shown and described. 